The sei whale is one of the fastest whales, reaching speeds of up to 30 miles per hour. Sei whales inhabit all oceans and adjoining seas except in tropical and Polar Regions. Like other great whales, they prefer to spend the summer feeding in cooler waters before migrating to warmer waters to breed and give birth to their calves. Whales are at the top of the food chain and have an important role in the overall health of the marine environment. They are also highly vulnerable to human activities in the ocean. The sei whale became a major target for commercial whaling after the preferred stocks of blue and fin whales had been depleted. Today, although commercial whaling has been officially halted, the species is subject to "scientific whaling" by Japan—that is, killing whales for scientific research.Get this: you can look good while being environmentally conscious. The women’s premium organic t-shirt is made up of 100% organic cotton, making it green and comfy. Plus, the shirt promises the best-possible print results, making it an excellent choice for those looking to customize. ITEM RUNS SMALL.